Just wondering if there is any eye twitching along with your dizziness or is it just light headedness? What's your blood pressure like? I'm interested in the BP when laying on your back and then right after you stand up. A drop in the BP when standing up may indicate a problem with your adrenal glands. If this is the case I would clean up the diet: cut out sugar, coffee (actually any caffeine), get more sleep, and take an adrenal supplement. The shoulder pain, is it always there or only with movement? Does it hurt when you first started raising your arm, is it the mid way point (90 degrees) or at the very top of elevation? I understand you have some degenerative discs at C5/C6/C7. This could also be part of your problem as the nerves do run to the shoulder. Since the pain killers are not working anyway, my suggestion is to go see a Chiropractor where you live who does Applied Kinesiology and find out what's what. Best Wishes Denver Chiropractor on Google